Wisconsin frost dates: T
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Taylor | May 9 | Oct 1 | 145 d | 4b |
| Theresa | May 1 | Oct 10 | 162 d | 5a |
| Thorp | May 7 | Oct 3 | 149 d | 4b |
| Three Lakes | May 25 | Sep 24 | 122 d | 4b |
| Tigerton | May 6 | Oct 5 | 152 d | 5a |
| Tilleda | May 13 | Sep 30 | 140 d | 5a |
| Tisch Mills | May 6 | Oct 12 | 159 d | 5b |
| Tomah | May 6 | Oct 3 | 150 d | 4b |
| Tomahawk | May 10 | Oct 4 | 147 d | 4a |
| Tony | May 7 | Oct 3 | 149 d | 4a |
| Townsend | May 22 | Sep 28 | 129 d | 4b |
| Trego | May 10 | Oct 4 | 147 d | 4a |
| Trempealeau | Apr 29 | Oct 11 | 165 d | 5a |
| Trevor | Apr 23 | Oct 21 | 181 d | 5b |
| Tripoli | May 13 | Oct 3 | 143 d | 4a |
| Tunnel City | May 9 | Oct 1 | 145 d | 4b |
| Turtle Lake | May 5 | Oct 4 | 152 d | 4b |
| Twin Lakes | Apr 30 | Oct 13 | 166 d | 5b |
| Two Rivers | Apr 27 | Oct 21 | 177 d | 5b |